Improvement in gang-plows



2 Sheets-Sheet I. L. CHAPMAN,

- GANG-PLOW. No.183,794 Patented Oct.31.1876.

2 Sheets-Sheet 2.

Patented Oct. 31,1876.

L. CHAPMAN. GANG PLOW mmmmlmi Illllllllll \ll E L 1 I J nnesses.

LUKE CHAPMAN, OF COLLINSVILE,

PATENT OFFICE.

CONNECTICUT, ASSIGNOR TO THE COLLINS COMPANY, OF SAME PLACE.

IMPROVEMENT lN GANG-FLOWS.

Specification forming part of Letters Patent No. 1 83,794, dated October31, 1876; application filed February 10, 1876.

To all whom it may concern Be it known that I, LUKE CHAPMAN, ofCollinsville, in the county of Hartford and State of Connecticut, haveinvented certain new and usefullmprove'ments pertaining toaGang- Plow,of which the following is a specification, reference being had to theaccompanying drawings, where- Figure 1 is a perspective view from therear, and, on the furrow-wheel side, in adjustment for regular work.Fig. 2 is a side elevation from the land-wheel side. Both land-wheel andfurrow-wheel are on the same level, each supposed to be running in afurrow. The dotted lines show the land-wheel and other parts prepared tomount, or rather as just having mounted, the land, through the action ofthe quadrant-arm, which forms the essential feature of this invention.Fig. 3 is a detail View of the quadrant-arm and adjacent parts inlongitudinal central section.

The main features of the machine shown in these drawings have alreadybeen patented to me by prior patents; and it is not necessary to go intoa description of all the parts and their operation in detail.

The letter a denotes the main shaft; 1), the furrow-wheel, (meaning thewheel which generally runs in the furrow,) and c the landwheel, (meaningthe wheel which generally runs on the land.) This land-wheel is hung onthe arm d, which is pivoted on the main shaft. From the arm 01, andrigid with it, rises the lever e. Pivoted on the main shaft, and rigidwith the arm 01, (and, consequently, rigid with lever 0,) is thequadrant-arm 0, hearing the interior gear segment or ratchet 0. Fast onthe main shaft rises the arm g, in which plays the reciprocating pawl h,pressed outward by spring 2', pressing the tooth h- (borne upon the pawlh) into contact and mesh with the ratchet 0'. To illustrate the officeand action of this quadrant-arm, suppose the whole machine to beadjusted for regular work, as shown in Fig.1, with the furrow- Wheelrunning in a furrow, and the land-wheel raised, and running on the land,and that, as happens when near the close of a piece of work, theland-wheel is about to drop into a furrow, (a thing which, uprovidedfor, would probably unseat the rider.) 111 such case the rider, puttinghis foot on the top of pawl It, presses the tooth h from its mesh withratchet 0, leaving arm (1 and land-wheel c to swing free on the mainshaft; and, when thus permitted, the land-wheel drops to position shownin Fig. 2, thus keeping the seat erect.

When the land-wheel needs to rise from the furrow to land, (a positionof aifairs shown in Fig. 2,) the rider with his foot unlocks thequadrant-arm from the main shaft, and, with his hand on lever k, (whichacts in conjunction with lever 6,) draws this lever back, as shown indotted lines in Fig. 2, and thereby raises the land-wheel to the levelof the land.

I disclaim, in this application, all that I have shown in my applicationfor patent for gang-plows filed April 14, 1875, in so far as itresembles the invention herein described.

I claim as my invention- The wheel 0, hung on the arm d, the lever e,and toothed quadrant-arm 0, all rigidly secured together, in combinationwith the rigid arm g, pawl h, and shaft a, all constructed and arrangedfor operation substantially as described.

In witness whereof I hereto set my hand.

LUKE CHAPMAN. Witnesses:

WM. E. SIMONDS, R. F. GAYLORD.

